The 2015 IAAF World Relays was the second edition of the biennial, global track and field relay competition between nations.

As in the previous year, it was held in May in Nassau, Bahamas.

Apart from contesting for the Golden Baton for the best team overall, the competition also served as a qualifying stage for the 2016 Summer Olympics in the 4 × 100 and 4 × 400 metres relay.

[1] The top eight-finishers in 4×100 and 4×400 events gained qualification into the 2016 Olympic Games in Rio de Janeiro.

The following teams secured a full set of relay places across four events at the 2016 Games: 669 athletes from 43 nations are set to take part in the competition.